SB2025081947 - Red Hat Enterprise Linux 9 update for kernel-rt
Published: August 19, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2025-21727)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the padata_free_shell() function in kernel/padata.c. A local user can escalate privileges on the system.
2) Out-of-bounds read (CVE-ID: CVE-2025-21991)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the load_microcode_amd() function in arch/x86/kernel/cpu/microcode/amd.c. A local user can perform a denial of service (DoS) attack.
3) Use-after-free (CVE-ID: CVE-2025-22020)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the rtsx_usb_ms_drv_remove() function in drivers/memstick/host/rtsx_usb_ms.c. A local user can escalate privileges on the system.
4) Input validation error (CVE-ID: CVE-2025-37797)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the hfsc_change_class() function in net/sched/sch_hfsc.c. A local user can perform a denial of service (DoS) attack.
5) Out-of-bounds read (CVE-ID: CVE-2022-50200)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the security/selinux/ss/policydb.h. A local user can perform a denial of service (DoS) attack.
6) Buffer overflow (CVE-ID: CVE-2022-50020)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to memory corruption within the ext4_resize_fs() function in fs/ext4/resize.c. A local user can escalate privileges on the system.
7) Use-after-free (CVE-ID: CVE-2022-50022)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the raid5_end_write_request() function in drivers/md/raid5.c. A local user can escalate privileges on the system.
8) Use of uninitialized resource (CVE-ID: CVE-2025-38086)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to use of uninitialized resource within the ch9200_mdio_read() function in drivers/net/usb/ch9200.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.